Top 3 Tools to Improve Email Deliverability

Email deliverability is crucial for successful email marketing campaigns. In this blog post, we will explore some free tools that can help improve email deliverability and ensure that your emails reach the intended recipients.

Squoosh: Reduce Image File Size

Squoosh is a powerful and user-friendly tool developed by Google that allows users to reduce the file size of images without compromising their resolution. With large image files becoming increasingly common, it is essential to find a solution that can optimize them for various purposes, such as email deliverability or website loading speed. Email servers often reject emails with large image attachments, making it vital to compress and optimize image files before sending them. Squoosh offers a simple and efficient way to achieve this, resulting in faster email delivery and a smoother user experience.

Reducing Image File Size

One of the primary features of Squoosh is its ability to reduce the file size of images while maintaining their quality. By using advanced algorithms and compression techniques, Squoosh allows users to significantly reduce the size of image files without noticeable degradation in picture quality. Whether you have a high-resolution photograph or a graphic image, Squoosh can help you optimize it for various use cases.

To get started, simply drop or paste the image into Squoosh's interface. The tool provides a preview of the original and optimized versions side by side, allowing you to compare the results visually. With customizable compression options, you have full control over the output file size and image quality. Depending on your requirements, you can experiment with different settings, such as adjusting the compression level, selecting a specific palette color, or even resizing the image.

Resizing and Customization

In addition to reducing the file size, Squoosh offers a range of customization options to meet your specific needs. Resizing an image can be crucial for various purposes, such as fitting it into a specific document size or optimizing it for web content. Squoosh allows you to resize images by specifying the desired dimensions or by using percentage scaling.

Furthermore, Squoosh enables you to customize the method of resizing, providing options like "Nearest Neighbor," "Bilinear," and "Lanczos." These options ensure that the resizing algorithm suits the specific image and produces the desired results. Whether you prefer a sharper output or a smoother one, Squoosh has you covered.

With the ability to customize palette color and compression value, Squoosh allows you to fine-tune the optimization process to match your requirements precisely. Whether you want to preserve the original colors or reduce the file size even further, Squoosh offers the flexibility to achieve your desired outcome.

Easy-to-Use Interface

One of the notable advantages of Squoosh is its intuitive and user-friendly interface. Even if you have limited technical knowledge or experience, Squoosh makes the image optimization process straightforward and accessible. The interface provides clear instructions and visual representations, ensuring that you can utilize the tool effectively.

Squoosh also supports various file formats, including JPEG, PNG, WebP, and even the latest AVIF format. This versatility allows you to optimize images regardless of the format they are originally in. With support for both dropping and pasting images, Squoosh provides a seamless and efficient workflow for image compression and optimization.

Why ALT Tags are Essential for Accessibility

In today’s digital age, emails have become an integral part of our personal and professional lives. However, not everyone can fully enjoy and engage with the content of an email, especially those with visual impairments. This is where the importance of ALT tags comes into play. ALT tags, also known as alternative text descriptions, provide a textual representation of images in emails, making them accessible to everyone, including visually impaired individuals.

The use of ALT tags in emails ensures that visually impaired individuals can understand and interpret the content of the images. By including a descriptive ALT tag, you provide them with a clear and concise description of what the image depicts. Whether it's a product photo, a logo, or an infographic, ALT tags enable visually impaired users to have the same experience and information as sighted users.

Enhancing Email Deliverability with ALT Tags

While ALT tags primarily serve accessibility purposes, they also play a crucial role in email deliverability. Email servers often rely on these ALT tags to determine the relevance and legitimacy of an email. This means that if you don't include ALT tags, your email might be flagged as suspicious or even sent to the recipient's spam folder.

By including descriptive ALT tags, you provide context to email servers about the images used in your email. This helps them understand the content and ensures that your email is delivered to the intended recipient's inbox rather than being marked as spam. Additionally, ALT tags can also improve the overall reputation of your email domain, leading to better deliverability rates.

Best Practices for Using ALT Tags

  • Use descriptive language: When writing ALT tags, be sure to use descriptive language to provide as much context as possible. Instead of simply stating "image," include specific details about the image to give visually impaired users a clear understanding.
  • Keep it concise: While it's important to be descriptive, it's equally important to keep the ALT tags concise. Avoid lengthy descriptions that may overwhelm or confuse users. Aim for a clear and concise description that accurately represents the image.
  • Avoid keyword stuffing: Although ALT tags are crucial for email deliverability, it's important to avoid keyword stuffing. Use relevant and accurate descriptions that align with the image. Keyword stuffing can negatively impact both accessibility and deliverability.
  • Test for accessibility: Before sending out your emails, make sure to test them for accessibility. Use screen reader tools to ensure that visually impaired users can understand and interpret the images through the ALT tags.

The Impact of ALT Tags on Accessibility and Deliverability

By utilizing ALT tags effectively, you not only ensure accessibility for visually impaired individuals but also improve the deliverability of your emails. These tags allow those with visual impairments to understand the content of your images, creating a more inclusive email experience.

Moreover, ALT tags provide valuable information to email servers, boosting the legitimacy and relevance of your emails. This increases the chances of your emails landing in recipients' inboxes rather than being filtered into spam folders, ultimately leading to better engagement and open rates.

So, the next time you create an email campaign or send out an email with images, don't forget to add meaningful ALT tags. They not only make your email accessible to everyone but also contribute to better deliverability rates. Embrace the power of ALT tags and make your emails more inclusive and effective!

The Deliverability Dashboard by EmailSmart

The Deliverability Dashboard by EmailSmart is a powerful and user-friendly tool designed to help you assess and improve the health of your email audience. Whether you are a small business owner, a marketer, or an email service provider, this tool is essential for optimizing email deliverability and increasing engagement with your subscribers.

To get started with the Deliverability Dashboard, you simply need to create a free account and sync it with your email service provider. Once your account is set up, the tool runs queries and gathers data from your email campaigns to provide you with valuable insights.

EmailSmart Score

One of the key features of the Deliverability Dashboard is the EmailSmart Score. This score represents the overall health of your email audience and indicates how likely your emails are to be successfully delivered to your subscribers' inboxes. The higher the score, the better your email deliverability is.

The EmailSmart Score takes into account various factors such as your email reputation, subscriber engagement, and list hygiene. By regularly monitoring your score, you can identify areas for improvement and take necessary actions to enhance your email deliverability.

Contact Engagement Details

In addition to the EmailSmart Score, the Deliverability Dashboard provides detailed information about the engagement levels of your email contacts. It gives you insights into how your subscribers are interacting with your emails, such as open rates, click-through rates, and unsubscribe rates.

By analyzing these engagement metrics, you can gain a better understanding of your audience and tailor your email content to their preferences. If certain contacts show low engagement, you can take proactive steps to re-engage them and prevent them from becoming inactive or unsubscribing.

Recommendations for Optimization

The Deliverability Dashboard goes beyond providing you with data and scores. It also offers recommendations on how to optimize your email deliverability. These recommendations are based on industry best practices and EmailSmart's extensive experience in the email marketing field.

The tool suggests actions you can take to improve your email reputation, increase subscriber engagement, and maintain a clean email list. For example, it may recommend removing inactive subscribers, segmenting your audience, or refining your email content to make it more relevant and engaging.

Benefits of Using the Deliverability Dashboard

The Deliverability Dashboard by EmailSmart offers several benefits that can help you achieve better results with your email marketing campaigns:

  • Improved Email Deliverability: By following the insights and recommendations provided by the tool, you can enhance your email deliverability and ensure that your messages reach the intended recipients.
  • Increased Engagement: Understanding how your contacts engage with your emails allows you to tailor your content and improve engagement rates. This can lead to higher open rates, click-through rates, and overall campaign success.
  • Better ROI: When you optimize your email deliverability and increase engagement, you are likely to see a higher return on investment from your email marketing efforts.
  • Time and Cost Savings: The Deliverability Dashboard automates the process of gathering and analyzing data, saving you time and effort. It eliminates the need for manual tracking and reporting, allowing you to focus on other important aspects of your business.

Mail Tester: Test Email Spamminess

Are your emails ending up in spam folders more often than you'd like? Are you missing out on valuable opportunities to connect with your audience because your email deliverability is suffering? Don't worry, help is at hand! In this blog post, we will introduce you to a fantastic tool called Mail Tester that can evaluate the spamminess of your emails and provide insights on how to improve your email deliverability.

What is Mail Tester?

Mail Tester is a free online tool designed to help you assess the spamminess of your emails. With a simple and user-friendly interface, this tool offers valuable insights into the factors that may be affecting your email deliverability. By using Mail Tester, you can identify potential issues and make the necessary adjustments to ensure that your emails reach their intended recipients.

How Does Mail Tester Work?

Using Mail Tester is a straightforward process:

  1. Go to the Mail Tester website and you will be provided with a unique and auto-generated email address.
  2. Copy the email address and add it as a recipient to your test email.
  3. Send the email as you normally would and wait for the results.
  4. Once the email is received and evaluated by Mail Tester, you will be given a spam score.

The spam score is a rating from 0 to 10, with 0 being the best score and 10 indicating a high likelihood of your email being flagged as spam. A lower score indicates better deliverability, while a higher score suggests that your email may require improvements to avoid spam filters.

What Does Mail Tester Evaluate?

Mail Tester evaluates various aspects of your email to determine its spamminess, including:

  1. Authentication: Mail Tester checks if your email passes authentication protocols, such as SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail). These protocols help verify the authenticity of your email and improve its chances of reaching the inbox.
  2. Message Containers: The tool analyzes the structure and content of your email's message containers, such as HTML and plain-text versions. It looks for any potential spam triggers or suspicious elements that could raise red flags among spam filters.
  3. Blacklisting: Mail Tester checks if your sending IP or domain is blacklisted by any spam monitoring services. Being blacklisted can significantly impact your email deliverability, so it's essential to address any blacklisting issues promptly.
  4. Broken Links: The tool also scans your email for broken links. Broken links not only affect user experience but can also be viewed as suspicious by spam filters. Mail Tester identifies these broken links so you can fix them and ensure a smoother email delivery process.

Improving Email Deliverability with Mail Tester

Based on the results provided by Mail Tester, you can take several steps to enhance your email deliverability:

  • Address Authentication Issues: If Mail Tester flags any authentication problems, take the necessary measures to ensure that your email authentication protocols are correctly set up. This might involve adjusting your SPF or DKIM settings, or working with your email service provider to resolve any authentication issues.
  • Optimize Message Containers: By carefully reviewing the structure and content of your email's message containers, you can make improvements to increase deliverability. Avoid using spam trigger words, excessive links, or suspicious HTML elements that might trigger spam filters.
  • Check Blacklisting Status: Regularly monitor your sending IP and domain to ensure that they are not blacklisted. If you find yourself blacklisted, take immediate action to rectify the situation by following the processes provided by the respective spam monitoring services.
  • Repair Broken Links: Broken links not only impact user experience but can also increase the chances of your email being marked as spam. Ensure that all links in your emails are working correctly and lead to the intended destinations.


Improving email deliverability is crucial for the success of your email marketing campaigns. With the constant evolution of technology and the increasing use of spam filters by email providers, it has become more challenging to ensure that your emails reach the intended recipients' inboxes.

However, by utilizing various tools and techniques, you can optimize your emails and increase the chances of them being delivered successfully. In this article, we have discussed some important tools that can assist you in improving your email deliverability.

1. Squoosh

Squoosh is an excellent tool for optimizing the images in your emails. Large images can significantly slow down email loading times, increase the file size, and even trigger spam filters. By using Squoosh, you can compress and resize your images without sacrificing quality, ensuring that your emails load quickly and are not flagged as spam.

2. ALT Tags

ALT tags play a vital role in email deliverability. When images are disabled or fail to load, ALT tags provide alternative text descriptions that convey the same information as the images. This is important because some spam filters might flag emails without ALT tags as suspicious. By including ALT tags for your images, you improve the chances of your emails getting delivered even when the images are not displayed.

3. Deliverability Dashboard by EmailSmart

The Deliverability Dashboard by EmailSmart is a powerful tool that provides comprehensive insights into the deliverability of your emails. It helps you track your email delivery rates, monitor your sender reputation, and identify any potential deliverability issues. By regularly monitoring and analyzing the data provided by the Deliverability Dashboard, you can identify and resolve any problems that might be hindering the successful delivery of your emails.

4. Mail Tester

Mail Tester is another useful tool for checking the deliverability of your emails. It allows you to send a test email to their system and provides you with a deliverability score along with detailed suggestions for improving your email deliverability. By following the recommendations provided by Mail Tester, you can optimize your emails and increase the chances of them reaching the intended recipients' inboxes.

By using these tools in combination with best practices such as maintaining a clean email list, personalizing your emails, and following email authentication protocols like SPF and DKIM, you can significantly improve your email deliverability rates.

Remember to always test your emails across different email clients and devices to ensure they render correctly. Additionally, stay up to date with the latest email marketing trends and regulations to ensure your strategies remain effective and comply with industry standards.

Share your favorite tools for improving email deliverability in the comments below and continue learning more about email deliverability through MailChimp's resources. By staying informed and implementing the right tools and strategies, you can maximize the impact of your email marketing campaigns and reach your target audience effectively.

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